README.md 742 B
Sound Experiments
2020-02-10
The Driver Interface Units (DIUs) and Passenger Interface Units (PIUs) on the buses need to be audible to drivers and passengers when accepting or rejecting passes.
This document collects some data about the ambient noise, the sound level of the legacy system and experiments with the replacement system.
| System Type | Typical dB | Button dB | Accept dB | Reject dB |
|---|---|---|---|---|
| Ambient on Bus | 70-80 | |||
| Legacy System | 95 | 97 | 95 | 95 |
| v Acorn Squash | 80 | 74 | 82 | 82 |
| v Alfalfa Sprout | 85 | 89 | 90 | 80 |